std.allocator: false pointers

[David Gileadi via Digitalmars-d]

On 5/2/14, 11:56 AM, Andrei Alexandrescu wrote:
> If speed is no issue, sure :o). My intuition is that the TwoBitVector
> would need certain primitives from BitVector to work well.

Heh, however it's implemented, TwoBitVector's very name implies that 
it's cheap to use ;)